A Right Now Solution for Syrian Refugee Crisis

Imagine Russia the USA, Iran and Israel on the same side. The great powers carve out a Safe Zone, inside Syria but outside Damascus and temporarily outside the reach of the Syrian government.
We do this now.
With everyone gathered in New York the timing is perfect for an emergency gathering.
Don't scatter the Syrian diaspora to the four corners of the earth.
What is needed is a great power coalition. Russia the USA Iran and Israel, plus the UN. The interests of the Sunni community will be represented by the Arab League.
This mighty and ready right now coalition can end the war in a huge and increasing swath of Syria. The powers create the Safe Zone.
The UN facilitates services to those displaced refugees with schools, honest work for appropriate salaries, health care and so forth, mainly security.